The boundary condition of the universe is that it has no boundary.

Time can behave like another direction in space under extreme conditions.

Intelligence is the ability to adapt to change.

So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist.

The thing about smart people is that they seem like crazy people to dumb people.

It is all right to make mistakes; nothing is perfect because with perfection, we would not exist.

I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

People won't have time for you if you are always angry or complaining.

It is reasonable to ask who or what created the universe, but if the answer is God, then the question has merely been deflected to that of who created God.

It is very important for young people keep their sense of wonder and keep asking why.

The development of full artificial intelligence could spell the end of the human race.

The death of a man is his sins.

Here is an equation worth remembering: Five dollars earned minus seven dollars spent = Unhappy Life." (Life Hacks, p.51)

The victim mindset will have you dancing with the devil, then complaining that you're in hell.

I've always had my guard. I have my cook and my guard. I want to eat, and I want to live.

In fact, my main conclusion after spending ten years of my life working on the TEX project is that software is hard. It's harder than anything else I've ever had to do.

I think jogging is bad for your health. All that pressure on the knees and back cannot be good for you.

I like a calm life where nobody bothers me.

Let bravery be thy choice, but not bravado.

One ought not to encourage beggars, and yes, you are right, it is far better to donate to charities that address the causes of poverty rather than to him, a creature who is merely its symptom.

Who better to so softly bind the wound of one, than she who has suffered the wound herself.